/**
 * #      297
 * 名称   二叉树的序列化与反序列化
 * 链接   https://leetcode-cn.com/problems/serialize-and-deserialize-binary-tree
 * 题解   [558](https://leetcode-cn.com/problems/serialize-and-deserialize-binary-tree/solution)
 * 通过率 54.3%
 * 难道   困难
 */

